PoE vs Low Voltage Power Supplies Cost Compared

Author: John Honovich, Published on Jan 23, 2011

In this note, we contrast the cost of powering cameras via Power over Ethernet vs a non-powered switch plus a low-voltage power supply.  Conventional wisdom tells us that powering cameras via UTP cable also carrying data provides great cost savings.  Rarely, however, do we see costs comparisons from anyone but PoE manufacturers.  To that end, we examine the economics of various configurations of PoE and low-voltage power supplies.

Factors Driving Costs

** ********** ***** ****** ***** *****, ** **** ********** *** factors ******* **** *** *** **** ***** *** ******** ** the *****.

*** ********* ******* ***** ***:

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  • ********** * ************ ***** ******. ***** *** ******* ****** **** as * ***** ******, * *** ******** ********** *** **** to ******** * ***-******* ***** ******. ** ******** **** ***** $5 - $** *** ******.
  • ********** ***** ***** ***********. ***** ***** **** **** *** *** UTP ***** ****** *** ***** ************, ** ********** ***** *********** is ********. ** ******** **** ***** $** - $** *** camera (******** ***** ***** ** $**-$*** *** **-** ******* *** termination).

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Cost ******* ********

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Detailed ********* **** ***********

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*** * *******, * **** ******* ** $*** ** ***’* favor (***** * *.* **** *** **** ******). ***** * 15 **** *** **** ******* ****** (*** ***** *****-******** ***** $***), *** ******* ***** ****** ** ***** $***.

Sixteen *******

 

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*** ** *******, * **** ******* ** $*** ** ***’* favor *** ***** * *** ****** (******** ****** **** ** a *.* **** *** **** ********). ****** ** * ****** which ******** **.** ****** *** ***** ******** ****** ** *** Catalyst **** ****, ***** ***** ** * $*,***+ *******.  **** obviously ***** *****-**** ******** **** ******** * **** ********** ******, especially **** *** ***** **** ******** ******** ** ***** ******** are *** ********.

Other ******* ** ********

*********** **** ***** *** ****** ********* *** ***** *****, *** emerges ** **** ****-*********, **** **** *** *******: *** ***** device **** ****** *** *****, *** *** **** *** *********** provide ****** ***** *** ***** ***********.  *** *******, ******* **** heaters/blowers ** ** ************, ** ***** ******* *** ******* ********* low-voltage *******.  *** **** ******** *********** ** ***** ****** ********* and *********** ***********, *** *********** ***** ************ ******.******** **** **** ****-***** ***** ******** **** ****, ****** ****-***** units *** ***** ********* *** ******** ** ************ *** ************** of *********.  **** ****-***** ***** ******** ***** ******* ** ** twice ** **** ** * ********** ****-***** ****, *** *** between *** *** ***-******* ***** ******** ********* *******.  *** ******** drive ** ***** **** *******, ***** *** ****** *** **** equipment *****, ** **** **** ******* ** ********** ***** ****, and ********** **** ** ***** *** ****** ***** ** *** rack.  ** ********* ********* ********* ****** *** ****** ************** ****** simply *********** *** ** **** *** **** ***********.

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